Driving mechanism for grinding-mills.



E. F. IVIcCOOL.

MECH/msm Foa omNmNG Mms.

APPLICATION FILED IIILY 26| |915.

Patented Apr. 3, 1917. 2 SHEETS-SHEET I.

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EDWARD MCCOOL, OF VICTOR, COLORADO, ASSIGNOR TO THE MCCOOL MFG. TRADING C0., OF VICTOR, COLORADO, A CORPORATION OF COLORADO.

DRIVING Mncnnivisivr roRjeRinDinG-MILLS Speccation of Iietters Patent;`

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Application filed July 26, 1915. Serial No. 42,084.'

To all whom t may concern; t

Be it known that I, EDWARD F.'McCooL, a citizen of the United States, residingat Victor, county of Teller, and State'of Colo'- rado, have invented certain new. and useful Improvements in Driving Mechanisms for Grinding-Mills; and I do declare the following to be a full, clear, and'exact description of the invention, such as; will enable others skilled inthe artto which it'apper'- tains to make anduse the same, reference being had to the accompanying drawings, and to the charactei's of reference marked thereon, which form a part of'this specification.

My invention relates to improvements in grinding mills of the'class covered by my Letters Patent of the United States NOS. 1,137,224; 1,188,966 ;'1,139,7 90 and 1,144,305, and dated April 27 May 11; May 18 and June 22, 1915, respectively.

My present improvement relates to means for transmittingmotion to a shaft eccentrically mounted within a sleeve or hollow shaft, theeccentrically mounted shaft being connected in operative relation to rotate a grinding member which is arranged` in coopera-tive yrelation with another grinding member, the latter in the specific construction disclosed being stationary.

Heretofore or in the 'constructions disclosed in the aforesaid patents the power is applied in the first instance to the sleeve orv hollow shaft, motion being transmitted to the eccentrically mounted shaft through the medium of a suitable gearing connection.

I have found that itis 'possible to dispense with this gearing connection, by applying the power in the first instance to the eccentrically mounted shaft, since it is possible to impart a certain degree of rotary movement to the sleeve, and in this way iinpart soinedegree oforbital travel to the eccentrically mounted shaft, the object being to give enough orbital travel to the eccentrically mounted shaft and the vdisk connected therewith, to cause the cooperating members to wear evenly and avoid the grooving, which grooving it is the object of the eccentric shaft construction to prevent. I have found by actual demonstration that a certain degree of movement may be imparted to the Sleeve or hOllQv Shaft in this manner and I lam thus confident that the present invention .has atleast a suificient'degree of futility to Ajustify the` making' of this applicatioi'i.l

I am" also disclosing in' this application a- System of-lubricatioir'for grinding mills of this construction, whereby the loil is taken froml a reservoir in the framework, carried Iupwardly and fed to a passage formed in the center ofthe eccentrically mounted shaft, .from which'it is carried by virtue, of'radially disposedperforations in the shaft by the action of centrifugal force, to allthe various parts to be lubricated. j 4 y j l Having brieliy outlined my improved construction, I will proceed to describe the same in detail, reference being made to the accompanying drawing` in which `is illustrated an embodiment thereof. In this drawing,-

Figure 1 is a centra-l vertical longitudinal .sectionofa grinding mill' equipped with my improvements.

Fig. 2 is'a similar view of the rear eX- tremity `of the mill shown on a larger scale.

Fig. 3 is a section taken on the line 3 3, Fig. 2, looking toward the left.

Fig. 4 is a section taken on the line 4 4, Fig. 1, looking toward the left.

rlihe same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a suitable ,framework which is formedhollow to receive-a Iquantity of oil or liquid lubricant 6. Within this framework is journaled a sleeve orholl'ow shaft 7 in which is eccentrically mounted a shaft 8, to the forward or left handeXtremity of which is connected a disk or grinding member 9 the connection being such as to cause the said member to rotate with the shaft. The rear or opposite eX- tremity of this shaft is equipped with a relatively` hard Vthrust block or end bearing member 10 whose rear extremity is engaged by a disk 12 whose rear side is 'in contact with a roller bearing member 13, in the rear of which is located a bearing disk 14 set into `a' block 15 which is connected with the easing as shown at16 to prevent rotation. This blockis enga-ged by a screw 17, by the adjustment of which, the shaft 8 is adjusted in an endwise direction to regulate the pressure of the grinding member 9 upon its cooperating stationary grinding member 18.

' Outside of the sleeve or hollow shaft I and surrounding the same is a bearing sleeve 19 to the forward extremity of which is secured an operating pulley 20, the pulley being connected with the sleeve by means of a key 21. The rear extremity of this bearing sleeve is provided vwith projections 22 which enter openings 23 formed in the web of a wheel 24 which is made fast to the rear extremity of the eccentrically mounted shaft 8 by means of a key 25. By virtue of this construction the operating pulley 20 is connected to rotate the shaft 8 on its own axis within the eccentrically arranged bearing of the hollow shaft 7. This hollow shaft 7 engages at its rear extremity the hub of the wheel 24 carried by the shaft S. Furthermore the forward or left hand extremity of the hollow shaft 7 engages as shown at 26 the Vrear extremity of the hub 27 of a fan blower 28 which is connected by means of a keyl 29 with the forward extremity of the shaft 8 just in the rear of the grinding member` 9, the grinding member and the hub 27 being spaced by a spiral spring 30, whereby the hub of the fan blower is forced against the forward extremity of the hollow shaft 7. F rom this it will be understood that the hollow shaft 7 engages at its opposite ends, parts 24 and 27 which are connected to rotate with the shaft 8Vwhich is positively rotated byl virtue of its connection with the Y pulley 20. By virtue of thisvconstruction and arrangement, it is safe to conclude that as the kshaft 8 is rotated some rotary movement will be imparted to the hollow shaft 7, and to the extent that the last named shaft moves rotatably, an orbital travel will be imparted to the eccentrically mounted shaft 8, in addition to the rotation of the shaft 8 on its yown axis. By lvirtue of this orbital travel of the shaft 8, a gyratory travel will be imparted to the grinding member 9, whereby the'two grinding members will be caused to wear evenly'during their coperative action, thus preventing grooving.

Y The hub 7 of the fan blower 28, is connected withthe hollow shaft 7 to prevent endwise displacement by means of a segment shaped key 31 which is dropped into a groove of corresponding shape formed in the connected parts, the key being ofsuffi- Yjcient depth t-oextend into the groove of both, members. The construction and arrangement of the fan blower connected with the shafts 8 and 7 as liust explained, is consistent withV the lrotary movement of the shafts7 and 8 in coperative relation as heretofore described.

The upper part of the rear extremity of theY framework contains a receptacle 32 whichis formed in part by an interior wall 33'arranged `outside of the wheel 24, and adapted to permit the rotation of said wheel. During the rotation of the shaft 8 Vand the wheel 24, the latter dips into the liquid luand 39 in the parts 10 and 12, the last named openings communicating with the rear cxtreinity of the longitudinal passage 40 in the shaft 8. In this way the oil or other liquid lubricant entei's the passage 40 of the last named shaft and is distributed by the action of centrifugal force and by way of perforations 41 in the shaft 8, 42 in the shaft 7, and through cooperating ports and passages, to the various surfaces of the moving parts requiring lubrication. rThe liquid lubricant is located in the front portion of the casing as well as in the rear portion, thellubricant 6 in the front part of the casing being carried upwardly by a wheel or circular member 43 mounted on the hollow shaft 7, and

deposited in a receptacle 44, whence it travquired. These caps are preferably provided with lubricant collecting plates or springs 48 which facilitate the transfer of the oil from the lower part of the casing to the receptacles 32 and 44. I

The structure is further provided with rings 49 which are hung loosely on the hollow shaft 7 and dip into the lubricant G in the reservoir formed in the lower part of the casing as heretofore described.

These rings during the rotation ofthe hollow shaft, may be relied on for distributing the lubricating material to some extent.

From the foregoing description the use and operation of my improved construction will be readily understood and need not be explained further in detail.

Attention is called to the fact that the upper segments of the rings 49 are located in recesses 50 formed in the bearing sleeve 19 in which the hollow shaft 7 is journaled. By virtue of this construction, these lubricating rings rest directly upon the hollow shaft and they are held in place against displacement lengthwise of the hollow shaft by Y Having thus described my invention, what I claim isf- 1. In a grinding mill, a hollow shaft, a second shaft ecoentrically mounted therein, and means for applying power to the second shaft to rotate the latter on its own aXis and to permit orbital travel with the hollow shaft, the second shaft having parts oon'- nected to rotate therewith and in frictional Contact with the olpposite extremities of' the hollow shaft to impart rotary movement to the latter.

2. In a grinding mill, a hollow shaft, a

second shaft eccentrieally mounted therein, means for positively rotating the second shaft on its own axis and to permit orbital travel with the hollow shaft, and means fixedly carried on said second shaft frictionally engaging said hollov7 shaft for imparting rotary movement to the latter.

In testimony whereof I aiX my signature in presence of two witnesses.

EDWARD F. MCCOOL. Witnesses:

HENRY L. BUTLER, J r., GLADYS OLVER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patente,

Washington, D. C. 

